Drawing-board



No Model.)

' A. H. SINCLAIR.

DRAWING BOARD.

. No. 269,601. Patented 1160.26, 1882 from the rear.

iTE STATES PATENT anion.

ANNIE I1. SINCLAIR, OF PHILADELPHIA, PENNSYLVANIA.

DRAWING-BOARD.

SPECIFICATION forming part of Letters Patent No. 269,601, dated December26, 1882.

Application filed October 2, 1882.

of Pennsylvania, have invented an Improvement.- in Drawing-Boards, ofwhich the following is a specification.

My invention has reference to drawingboards for both artistic andmechanical drawing; and it consists in providing the board or skeletonframe with hinged slats on the back thereof and close to its edges, andproviding said slats with points or projections, which are adapted to bepressed down upon the paper or canvas to hold it in position, and inmany details ofcoustruction, all of which are fully set forth in thefollowing specification and shown in the accompanying drawings, whichform part thereof.

' The object of this invention is to provide a drawing board or framewith suitable means wherewith the drawing paper or canvas may be securedtemporarily in position, and, if desired, allow the paper to bestretched, as is done in cases in which the panel drawingboards areused; further, to reduce the expense in the manufacture of a.drawing-board adapted to the purposes for which this invention isdesigned.

In the drawings, Figure 1 is a perspective view of my improveddrawing-board, looking Fig. 2 is a cross-section of same. Fig. 3 is across-section of one edge of the board, showing a substitute for thepins. Fig. 4. is aperspective view of the slats used in the constructionshown in Fig. 3. Fig.5 is a similar section, and shows a modification ofthe slat. Fig. 6 is a front view of the board with the modificationshownin Fig. 5 applied thereto, and Fig. 7 is a cross-section of the boardwith the slats arranged upon the face.

A is the board or skeleton frame.

B B and G U are the hinged slats, and are secured to the board or frameby hinges E a short distance from the edges and equal to the width ofthe slat. The slats B are longer than slats O and extend the full lengthof the board, as shown, and on their hinged side they are notched, as atb, to allow the paper P to. be placed under to form a square corner. Theface of all of these slats adjacent to the board or frame are providedwith points or projec- (No model.)

tions D, which, when the slats are pressed down upon the paper, passthrough said paper and extend into the frame or board, as shown.

To cheapo-n the construction, the pins 1) may be driven through a pineslat and held therein by a veneer, F, of hard wood.

In place of pins D, a rib or projection, D,

may be used, extending the-entire length, the said rib squeezing thepaper into a corresponding groove in the rear of the board.

To make the board better adapted for mechanical drawings, the edges ofthe slats may be extended at right angles, as shown at B, and which,when the paper is stretched and ready for use, come flush with saidpaper, so that they may be used as straight edges for the T-square, asshown in dotted lines in Fig- 6.

' In place of putting the slats on the back, they may be hinged aroundthe edges of the board or frame and on the front, as shown in Fig. 7;but I prefer the construction shown in Fig. 1.

ln stretching the paper on the board the paper is first wet, and, whenexpanded, is laid upon the face of the board, and the edges are doubledover'and clamped by slats and pins, and when the paper dries it is astight as a drum-head.

Having now described my invention, whatI claim as new, and desire tosecure by Letters Patent, is-

1. A drawing board or frame provided with hinged slats arranged aboutits edges, the said slats being-provided with means to catch and holdthe paper or canvas, and recesses upon their hinged edges to allow thepaper to be bent over the back of the board and under the said slats,substantially as and for the purpose ISO slats 0, provided with pinsDand hinges E, as veneer, and pins D, the said veneer acting to shown anddescribed. prevent the pins being pressed back into the 4. Thecombination of board or frame A, soft wood,substantially as and for thepurpose hinges E, and slats B 0, provided with pins specified. 15 5 D,one or more of said slats being extended, In testimony of whichinvention I hereunto as at B, to form a straight edge outside and set myhand. flush with the stretched paper suhstantiidlyas 1 r s T and for thepurpose specified. Ax

5. The combination of board or frame A, Witnesses: 1o hinges 1 and slatsB 0, consisting of soft It. A. GAVIN,

wood covered on the back with a hard-wood I R. S. CHILD, Jr.

